Yeah, in an ideal world content creators could make an entire salary off of donations and offering simple perks and exclusive access. But actually this is a terrible career advice and relatively few people actually end up making anywhere close to $100k on Twitch or Patreon. For each example the author mentions there are 100s if not 1,000s more who are wasting their time. We just aren’t a society where most people don…
There are relatively few content creators making $100k/yr from a single platform, but there are tons of people making that and more by utilizing all of the platforms. The first piece of advice I always give to musicians is to treat every social media and streaming platform as its own "venue" with their own unique set of users -- because they are. Always performing at the same venue in your hometown isn't going to be lucrative or sustainable, so you branch out to other venues and other cities, because that's the only way to find new markets.
The same is true for all content creation. Focusing on in-person performances ignores the entire online market, which is >99% of potential revenue. Focusing on Twitch ignores the opportunities of TikTok and YouTube. But if you take the time to understand the quirks of each platform and its users, and then chop up your content into sizes and styles appropriate for each platform, it's actually extremely easy to go from zero online presence to $10k/mo within two years.
Not everybody understands Patreon or wants to use it (and frankly, it's not a very usable site), so if your subscriptions are solely based around that platform, then you're ignoring 95% of the potential subscriber market and making everything more difficult than it needs to be. Content is content. It can go anywhere, and investing a few days into learning basic video editing makes content distribution a breeze.